A Story From the Field: The First Time She Opened the Cupboard After the Flood, She Shut It Again Immediately

Khun Pimchanok and her husband are newlyweds living in a three-storey townhouse in a lane off Charan Sanitwong Road, in Bang O, Bang Phlat district, on the Thonburi side of Bangkok. They spent a large share of their savings on a white laminate built-in kitchen, and on a fitted wardrobe in the ground-floor bedroom they had set up for Khun Pimchanok's mother, who moved in to help look after their baby.

During the 2026 floods, water from the Chao Phraya and from the drains in their lane rose into the house to about twenty-five centimetres and stayed for three days. Everyone moved up to the second floor. Once the water receded, the couple scrubbed the floors and wiped down the cabinet doors until they gleamed. Laminate is waterproof, they assumed, so the units should be fine.

Five days later, the kitchen plinths and the bottom panels began to swell and bulge until the doors would no longer close properly. The lower edges crumbled into fibres. When Khun Pimchanok opened the cupboard under the sink for the first time, a wave of musty air mixed with drain smell and river mud hit her so hard that she shut the door straight away. In her mother's wardrobe, clothes on the bottom shelf were covered in white and green spots, and every garment, even those hanging high up, smelled musty. Her mother developed a blocked nose and an itchy rash on her arms, and their two-year-old started to cough.

Khun Pimchanok called World Health Disinfection (WHD) with three questions: "Do we have to throw away cabinets we only installed last year? If we keep them, will there be mold inside? And what do we do with the clothes in the wardrobe?" Many families in Bang Phlat, Bang O, Bang Bamru and Bang Yi Khan are asking exactly the same thing. This article answers them honestly.

Why Flooded Built-In Units Become the Biggest Source of Odor and Mold in the House

Built-in furniture is designed to look seamless and stay put, which is exactly what makes it so troublesome after a flood. Water gets in easily and has almost no way to get out. Unlike a sofa or a table, you cannot simply carry a fitted unit into the sunshine to dry, and you cannot see what is happening behind it.

• Most carcasses are particleboard or MDF. The face may be waterproof laminate, but the core is wood chips or fibres bonded with glue. Once the bottom edge touches water, the core wicks it upward like a sponge, swells and rarely returns to its original shape.
• The wall behind never sees daylight. Built-in units sit tight against the wall, so the gap behind them and under the plinth is dark, stagnant and airless. Water and silt that flow in stay there, giving mold and bacteria the perfect place to grow.
• The under-sink cupboard concentrates the risk. It combines waste pipes, everyday humidity and floodwater mixed with sewage, which may carry bacteria such as E. coli and the organism that causes leptospirosis.
• Fabrics in closed wardrobes soak up odor and spores. Clothes, sheets and blankets stored in a closed wardrobe absorb musty odor and mold spores very efficiently, even if they never touched the water.
• Health effects. Mold spores can trigger allergies, asthma, coughing, a blocked nose and skin rashes. Elderly relatives and young children who wear clothes from that wardrobe are directly exposed.
• Food safety. Food, seasonings and utensils stored in flooded kitchen cupboards may be contaminated.

Which Units Can Be Kept and Which Should a Cabinetmaker Remove?

To be clear from the start: WHD is not a cabinetmaker or an interior contractor. Removing, repairing or rebuilding units should be assessed on site by a built-in furniture maker. From the many homes where we have carried out disinfection after floods, though, a consistent pattern emerges.

1. Particleboard or MDF carcasses that have swollen, bulged or crumbled at the edges. These almost never regain their strength, and the glue in the core may have broken down. The damaged parts, usually the plinth and the lower side panels, should be removed by a cabinetmaker. In many cases the whole unit has to be replaced.

2. Units where only the legs or plinth got wet and the cabinet body has not swollen. A cabinetmaker may be able to replace just the plinth or the bottom panel and keep the upper carcass. Even so, the unit should be taken off the wall so that the wall behind can be inspected.

3. Solid wood, aluminium or stainless-steel units. These can usually be cleaned, disinfected and reused if the structure is sound, though the wall behind and the base still need checking.

4. Wall-hung upper cabinets that stayed dry. These are usually fine to keep, but the interiors may smell musty from the humidity in the room. They should be cleaned and included in the ozone treatment area.

Units in riverside condos and townhouses. Many developments in Bang Phlat came with developer-installed built-ins made entirely of laminated particleboard. If you live in a condominium, notify the juristic person and check your insurance conditions before anything is removed, and photograph all the damage so it can support a claim or the contractor's assessment.

Signs that removal is the sensible choice: panels swollen so badly that doors will not close; crumbling edges; mold on the back panel or on the wall behind; a musty or drain smell every time you open the door; or anyone in the household developing allergy symptoms. In these cases keeping the unit is rarely worth the risk.

What Was Inside the Cupboards: Clothes, Food and Kitchenware

• Food and seasonings that touched floodwater: discard all of it, including anything in packaging that was not completely sealed.
• Plates, bowls, pots and utensils: heat-resistant items can be washed and sanitised. Wooden chopping boards, scratched plastic containers and anything absorbent may not be worth keeping.
• Clothes that were soaked by floodwater: wash them separately in hot water as far as the fabric allows. If stains or smells remain, consider discarding them, especially children's clothes and underwear.
• Clothes that stayed dry but smell musty: wash and dry them thoroughly in the sun, then keep them out of the wardrobe until the wardrobe and room have been disinfected and ozone-treated.
• Mattresses, pillows and thick blankets: if they sat in floodwater, they usually have to go. If they only smell musty, our dust mite removal service combined with ozone treatment may help.

Why DIY Fixes Do Not Get Rid of the Problem

• Wiping the cabinet fronts clean. The smell and mold are inside the core, under the plinth and behind the unit, not on the face.
• Putting charcoal or odor absorbers in the cupboard. They take the edge off the smell, but they do nothing about the moisture and contamination embedded in the unit.
• Spraying bleach inside the under-sink cupboard. It adds moisture to the panels, and the fumes build up inside a closed cupboard and sting the eyes and nose.
• Carrying on using a unit with a swollen base. A swollen carcass keeps drawing moisture from the floor. The smell will not go away on its own.
• Ripping out the old unit and installing a new one straight away. If the wall behind and the floor under the base are not disinfected, the new unit will face the same problem.

The Solution: Cabinetmaker Removes Damaged Units, WHD Disinfects Behind Them and Ozone-Treats, Then New Units Go In

1. Site survey. The WHD team checks each unit, the water level, where the musty smell is strongest and where mold is visible, and advises which units the cabinetmaker should assess for removal.
2. Emptying the cupboards. Clothes, food, kitchenware and everything else are taken out and sorted as described above.
3. The cabinetmaker removes damaged units or panels. Swollen units or panels are taken off so the wall behind and the floor beneath the base are fully exposed. A plumber checks the pipes under the sink, and an electrician checks any sockets behind the units.
4. Cleaning the wall and floor. Mud is scraped off, stains are washed away and the lower wall is wiped down.
5. Disinfection fogging with Chemgene HLD4H. Our team fogs CHEMGENE HLD4H as an ultra-low-volume (ULV) fine mist over the wall behind the units, the floor under the base, the interiors of any units being kept, and the whole kitchen or bedroom. See our disinfection service.
6. Ozone shock treatment. Every remaining cupboard door is opened, the room is sealed, and an ozone generator runs at a dose suited to the space. This helps deal with spores in the air and in the corners of cupboards, and breaks down musty odor molecules. See our ozone treatment service.
7. Ventilation, drying and a re-check. The room is ventilated thoroughly after treatment, and the wall and floor are left to dry for as long as the cabinetmaker specifies. The smell is checked again before new units are fitted or clothes go back into the wardrobe.

Ozone safety: No people, pets or plants may be in the space during treatment. Our team seals the area and controls the timing. After treatment the room must be ventilated adequately before anyone goes back in, and households with babies and elderly relatives should wait until the room is well aired. Food should be removed from the area. Sensitive kitchen appliances, rubber items such as fridge door seals, and leather goods should be covered or removed, and we control the ozone dose to suit the room. Any appliance that was submerged must be checked by a technician before use.

Questions Worth Asking Your Cabinetmaker

A replacement kitchen or wardrobe is a significant expense, so it pays to plan it with the next rainy season in mind. Your cabinetmaker will advise what suits your home and budget, but these questions are worth raising:

• Can the plinth or base be made from a moisture-resistant material, so that a future flood only damages a part that is cheap to replace?
• Can the units be raised on adjustable legs with a removable kickboard, so the floor beneath can be cleaned and inspected?
• Is it possible to leave a small ventilation gap behind the units, rather than fixing them hard against an outside wall?
• Would a moisture-resistant board grade be appropriate for the under-sink cabinet, which faces the highest risk?
• How long should the wall and floor dry before installation, and how will that be checked?
• Which day would suit the disinfection and ozone team, so that our work fits neatly between removal and installation?

A Realistic Timeline for a Flooded Kitchen or Bedroom

Every home is different, and your cabinetmaker's checks should set the real pace. As a rough guide, this is how the work often unfolds in a Bang Phlat townhouse:

• First two or three days: Empty all cupboards, discard contaminated food, wash and sun-dry clothes, photograph the damage, and contact a cabinetmaker. Book the WHD survey.
• End of the first week: The cabinetmaker removes swollen units and plinths. The plumber and electrician check pipes and sockets.
• Immediately after removal: WHD carries out disinfection fogging behind and under the units and throughout the room, followed by ozone shock treatment with all remaining doors open, and then ventilation.
• The following week or two: The wall and floor dry out with good airflow while the new units are being made.
• Before installation: A final odor check and any targeted re-treatment, then installation, and finally clean clothes and kitchenware go back in.

Keeping the Household Running While the Kitchen Is Out of Action

For a young family with a baby and a grandparent at home, losing the kitchen for a couple of weeks is a real strain. A little organisation makes the gap far easier to live with. Set up a temporary cooking and washing-up corner on an upper floor or a clean, dry part of the house, using a portable induction hob or rice cooker and a plastic tub for dishes. Keep baby bottles, formula and the child's utensils in a sealed box well away from the work area. Store clean, sun-dried clothes in sealed bags or plastic boxes upstairs rather than in any wardrobe that has not yet been treated. Agree with your cabinetmaker and with WHD on the exact dates for removal, treatment and installation, so you know how long the arrangement will last. And keep the treated room closed to children and pets until it has been ventilated as our team advises. These small steps keep everyone fed, clean and healthy while the real repair is done properly.

What Ozone Does, and What It Does Not Do

Ozone is a gas, so it can reach every shelf, drawer and corner of an open cupboard, as well as the gaps behind units that cannot be removed. It helps deal with mold spores and bacteria in the air and on surfaces, and it breaks down many of the odor molecules that make a flooded kitchen or wardrobe smell musty. It does not shrink swollen particleboard, it does not dry a wet wall, and it does not remove mold that has grown deep into a soaked panel. That is why removing damaged units and allowing proper drying always come first, with Chemgene HLD4H fogging for the surfaces and ozone for the air and hidden spaces working together afterwards.

10 Reasons to Disinfect and Ozone-Treat Before New Units Go In

1. When the units are off the wall, it is the only time you can fully reach the wall behind and the floor under the base before they are covered again for years.
2. Fine mist from our disinfection fogging service reaches narrow corners behind units and the joint between floor and wall.
3. Ozone reaches inside every shelf and drawer of the units you are keeping.
4. It reduces musty odor lingering in the kitchen and bedroom. Read more about ozone odor removal.
5. It lowers the chance of expensive new units developing a musty smell or mold.
6. Freshly washed clothes will not pick up the old smell again when they go back into the wardrobe.
7. It suits homes with babies and elderly relatives who have allergies.
8. Chemgene HLD4H is a high-level disinfectant, and our team uses it at the manufacturer's recommended dilution.
9. It fits into the time you are already waiting for new units to be made, so it does not delay anything.
10. Afterwards, you can keep cupboard handles and countertops clean yourself with the CHEMGENE HLD4H spray.

Customer Voice (A Story From the Field)

"My heart sank when I heard the base of our new kitchen had to come out. But when the cabinetmaker took it off and we saw mold all over the wall behind it, I understood immediately. The WHD team was upfront that removing and rebuilding the units was a job for the cabinetmaker, and they looked after the disinfection and ozone before installation. Now the cupboards don't smell when we open them, and my mother and my son are both doing better."

— Khun Pimchanok, townhouse off Charan Sanitwong Road, Bang Phlat

Frequently Asked Questions

Q: The cabinets are waterproof laminate, so why did they swell?
A: The face resists water, but the bottom edges and the particleboard or MDF core absorb it very readily. Once an edge gets wet, the core swells and usually does not shrink back.

Q: Do we have to remove the whole unit?
A: It depends on whether only the base swelled or the damage climbed into the carcass, and whether there is mold behind it. A cabinetmaker who sees the units should decide. In many cases only the plinth and lower panels need replacing.

Q: Does WHD remove or build cabinets?
A: No, that is not our work. Removal and new units should be handled by a built-in furniture maker. WHD provides disinfection fogging and ozone treatment, and we are happy to coordinate with your cabinetmaker.

Q: Can musty clothes be ozone-treated together with the wardrobe?
A: It is best to wash and dry them thoroughly first and return them to the wardrobe only after ozone treatment and ventilation. If washed clothes still smell, ask our team about additional treatment.

Q: When can we cook in the kitchen again after ozone treatment?
A: Once the room has been ventilated adequately, as our team advises, and after washing utensils before use. No people, pets or plants may be inside during treatment, and food should be removed from the area.

Q: The upper cabinets stayed dry. Do they need anything?
A: Wipe them clean and leave the doors open during ozone treatment so the musty smell that built up inside is treated at the same time.

Q: Do you cover Bang Phlat and the rest of Thonburi?
A: Call 065-556-6294 or message LINE @whd268 to check availability and book a site survey.

Before New Units Go In, Let WHD Disinfect Behind Them

WHD is ready to survey homes, townhouses and condos in Bang Phlat, Bang O, Bang Bamru, Bang Yi Khan and nearby areas.

Book Ozone Treatment – Click Here

See Disinfection Service – Click Here

Call 065-556-6294 · LINE @whd268 · Email worldhealthdisinfection@gmail.com

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• External source: WHO: Floods fact sheet and Thailand Department of Health